---
title: "COBOL Logic Read Multiple-Files Write to Output"
description: "COBOL sample program to read Master and Transaction files and write modified records to the output file."
url: https://srinimf.com/2016/08/26/how-to-write-master-file-popular-program-in-cobol/
date: 2016-08-26
modified: 2026-10-10
author: "Srini"
image: https://i0.wp.com/srinimf.com/wp-content/uploads/2016/08/pexels-photo-5554235.jpeg?fit=1880%2C1253&ssl=1
categories: ["COBOL Sample Programs"]
tags: ["How to write Master and Transaction file logic in COBOL"]
type: post
lang: en
---

# COBOL Logic Read Multiple-Files Write to Output

Here’s sample COBOL program reads **Master and [Transaction file](https://srinimf.com/2015/05/24/writing-transaction-file-to-master-file-in-cobol-8-tips/)s** [and write](https://srinimf.com/2023/12/03/reading-and-write-array-data-python-files-challenges/)s modified records to the output file. This is tricky program. The best application of this type program, you can find [in Banking](https://srinimf.com/2017/09/25/rpa-application-financial-domain/) projects.

Related[DB2 Indexes Type 1 Vs. Type 2](https://srinimf.com/2010/07/24/db2-index/)

## COBOL [Sample Program to](https://srinimf.com/2016/04/06/cics-sample-program-to-read-a-file/) Read Master, Transaction Files, and Write to Output File.

[![COBOL Sample Program to Read Master, Transaction Files, and Write to Output File.](https://i0.wp.com/srinimf.com/wp-content/uploads/2020/11/cobol-master-file-1.jpg?resize=300%2C300&ssl=1)](https://srinimf.com/wp-content/uploads/2020/11/cobol-master-file-logic.pdf)

Keep Reading

- [How to Submit JCL from COBOL](https://srinimf.com/2016/12/12/how-to-submit-jcl-from-cobol-program/)DateDecember 12, 2016
- [COBOL mostly asked Interview Question on Files](https://srinimf.com/2016/02/04/cobol-mostly-asked-interview-question-on-files/)DateFebruary 4, 2016
- [How to Write COMPUTE Logic in COBOL Best Example](https://srinimf.com/2016/08/23/use-compute-coding-in-a-better-way-for-your-cobol-programs/)DateAugust 23, 2016

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